surprisingly so for something that could potentially be supporting 1000s of lb. In the chart above they have Max Bolt Torque, Tmax (ft-lbs)... however, it's MAX, so I'm not sure if that's the ideal installation torque or the point of failure
– NSjonasMay 8 at 17:56

I always read instructions like that then allow an adjustment for the materials I am working with...
– Solar MikeMay 8 at 18:04

2 Answers
2

You are expected to put a mark on the thing you are turning, so you can observe its rotation.

They have no way of knowing which kind of wrench you are using, what your wrenching style is, or what amount of swing angle local clearances will afford you.

"Hand/finger tight" is the point at which all free lash/slop has been removed, further turning actually loads the fastener, and torque becomes measurable.

In a fastener in tension, how much strain a "turn" amounts to depends an awful lot on the length of the fastener subject to tension. Getting from "strain" to "torque" then involves a lot of other stuff.

In the case of the anchor in your link, it has little to do with tension. It is intentionally deforming the anchor to make it engage the hole you just drilled.

well... In that case I've been doing this correctly for a long time (luckily not for this particular use case). Wish they had just said 1080-1440 degrees...
– NSjonasMay 8 at 18:01

1

When I tighten something hand tight, my friends have to find a spanner to get it undone... Mind you, serious tech to "put a mark on the thing you are turning" ...
– Solar MikeMay 8 at 18:02

also, I assume then that the Max Bolt Torque, Tmax (ft-lbs) in the above spec, would indicate the rated torque of the bolt (not to be exceeded) and has nothing to do with installation torque (except that you should not exceed it when installing)
– NSjonasMay 8 at 18:05

@NSjonas, you can't expect the average person to have any idea what 1440 degrees is or even how to figure that out.
– JPhi1618May 8 at 19:50